Paraffined paper receptacle



May 19, 1936 J. J. SCHMERLER 2,041,374

PARAFFINED PAPER RECEPTACLE Filed July 17, 1954 l I "mi c]: Jgck r Patented ey 19, 1936 is; STATE ris 8 Claims.

rate bottom has been inserted in the receptacle and then the lower end of the receptacle is ofiset and rolled inward to form with the flange of the disk an inwardly turned bottom. The receptacle is then paraiiined outside and inside. joint or bead at the bottom is then filled with molten paraffine which renders it entirely leakproof when finished. The paraffine used for this purpose ishard parafiine, which is very brittle and frangible even at a normal temperature of 60 F. Milk, however, requires to be kept at a much lower temperature as it deteriorates at a temperature of 60 F. and this lower temperature renders the paraiifine so very brittle that even small shocks or vibration, such as the receptacle is bound to receive in transportation or shipment, will cause the extremely frangible parafline to crack, the liquid will penetrate through these cracks, and will leak out, and in actual use it has been found that the proportion of leaking receptacles will be as high as four to a dozen. This means not only a great loss of milk but damage to other articles, and renders these receptacles or the material contained therein unsalable.

The object of my invention is to obviate these objectionable features by forming the bottom of the receptacle in substantially one piece of ma terial integral with the side wall of the receptacle or body and unslitted or whole, there being only a small central opening in the bottom of the receptacle closed by a clamping button.

A further object is to so form the bottom of the receptacle that it is upwardly arched or domed whereby it will resist the pressure of the liquid contained in the receptacle and whereby it provides a hollow portion at the bottom of the receptacle elevated above anything which may strike the receptacle and thus be preserved from contact with other objects which would tend to break the bottom.

A further object is to form an involuted bead at the juncture of the bottom and side wall which constitutes a reinforced edge receiving all shocks or jars.

Other objects will appear in the course of the following description.

My invention is illustrated in the accompanying drawing, wherein:-

Figure l is a vertical diametric section thru the The rolled lower portion of a receptacle constructed in accordance with my invention.

Fig. 2 is a section on the line 2-2 of Fig. 1.

Fig. 3 is a section on the line 3-43 of Fig. 2.

Fig. 4 is a fragmentary vertical section thru the lower corner of the receptacle showing a modification therein.

Fig. 5 is a fragmentary elevation of the blank from which the receptacle and bottom are made.

Fig. 6 is an enlarged vertical fragmentary section through the'cap and arfiaceht portionsof the receptacle.

The receptacle as shown in Figs. 1 and 2 is formed from a blank A which is shown in Fig. 5.' This blank at a distance from its lower end is folded to form a portion B which portion is designed eventually to form the bottom of the completed receptacle. By means of a suitable mandrel which is formed with corrugations upon one end and by means of a co-acting gear wheel, radial corrugations or incomplete folds are formed in the bottom B of the blank. These are afterwards pressed down to form closed or tight folds, as shown in Fig. 3. The blank is designed to be placed on a cylindrical mandrel and the adjoining edges ill of the blank A are either overlapped or abutted against each other, as shown in Fig. 2, and the joint covered by a strip of paper or other fabric H which is provided with adhesive. This strip extends the full length of the blade.

I do not wish to be limited to making a butt joint at this point as a lap joint maybe used. Nor do I wish to be limited to the particular steps referred to in initially forming the blank and corrugating the portion B and applying the strip ll. After the bottom corrugations have been formed in the bottom B and the receptacle closed by the strip ii, the bottom portion of the receptacle is now bent inwardly and then a bead l3, as shown in Fig. 1, is formed at the junction of the side wall of'the receptacle with the bottom wall.

To this end the doubled material at the junctionof the side wall with the bottom wall is bent upwardly, then outwardly, and then downward, so that the treble thickness, designated I4, is

, formed at the junction of the side wall l5 with the bottom it. The receptacle is then placed on a mold and the bottom is forced upward so as to give it a semi-spherical or domical shape, the folds i2 being pressed together tightly. .A central opening is, of course, leftunder. these circumstances, and this central opening is trimmed to uniformity. Within this central opening is placed a button H which may be in the form of a snap button, the button having a central shank, an upper flange i8, and a lower section 19. Preferably a washer of paper, designated 20, will be placed between the lower section it! and the wall of the opening, as shown in Fig. 1, and if desired the upper flange i8 may be covered with paper, designated 2i. After the receptacle has been completed in the manner stated, it is then impregnated with parafiine, as usual, the parafilne covering the cap I! and of course entering around the bead l3.

It will be seen that any force applied at the outside edge of thehollow receptacle cannot cause leakage, as there are no holes or cracks at this point. Any force transmitted to the center of the bottom reaches the empty space of the arch, which arch is thus protected against shocks or jars. Any shocks or jars will be received by the reinforced edge or bead l3 and will be transmitted either directly upward through the body of the receptacle or in a line normal to the arch itself or in a direction between the wall I5 and the bottom and be translated into waves in the liquid itself. These waves break up the force so that when it reaches the center it can do no harm.

In Fig. 4, I have shown a slight modification in which an extra sheet of paper, designated 22, has been placed upon the bottom and folded in into the bead i3, and rests thereon, thus reinforcing the bottom and giving additional strength. Of course, this paper may be cut out at the center and the edges of the opening clamped between the upper and lower flanges of the button. And if this extra sheet of paper 22 is used, the washer 20 may be omitted. Itwill be seen that this extra sheet 22 adds a great deal of stiffness to the bottom l6 and to the bead I3.

It is to be particularly noted that the bottom wall i6 is formed of a layer of paper or like material which is folded radially and which is unslitted, thus eliminating the trouble found in practice with receptacles of this same character in which the bottom wall is formed by vertically slitting the cylindrical body at its lower end, then folding these slitted portions inward and pasting them in successively overlapping relation to each other, as in structures of this kind the liquid is very likely to affect the paste or other material used in pasting the slitted portions together and the liquid leaks through wherever there is a joint. This is particularly true where receptacles are intended for carrying milk or other liquid contents which have to be placed in'receptacles for a number of hours. If the receptacle is to be used only for a moment this difflculty does not occur, but receptacles designed for holding milk, cream, or the like, must be of such construction as to hold the liquid for at least seventy-two hours.

This form of receptacle is usually slightly conical or has the form of a truncated cone, and these receptacles are known as. Sealcones, the upper end of the receptacle being pinched together and closed by a metallic clamp, as shown in the patent to Reilley, No. 1,623,269, granted April 5, 1927, and the patent to Stanley, No. 1,699,549, granted January 22, 1929. In both of these patents the bottom of the receptacle is formed as a separate insert of paper or sheet material and this construction is open to the objection heretofore stated, that the extremely frangible and brittle paraiilne is liable' to break in this joint between the bottom and the side wall of the receptacle and permit leakage.

I claim:

1. A receptacle of the character described formed of a single sheet of flexible material shaped to tubular form, the bottom being formed 'fopposed surfaces of the margin of the central opening and holding said folds closed tightly against each other at the center, the receptacle being impregnated with liquid proof material.

2. A receptacle formed of a single sheet of flexible material shaped to tubular form, the bottom of'the receptacle being formed by an inwardly extending, radially folded, unslitted integral lower end of the sheet, anda central twopart button clamping against opposed surfaces of the margin of said opening and holding said folds pressed tightly against each other at the center, the receptacle being impregnated with liquid proof material, the turned-in and integral bottom of the receptacle being upwardly domed.

3. A receptacle of the character described formed of a single sheet of flexible material shaped to tubular form and secured at the iongitudinal marginal edges, the bottom of the receptacle being formed by an inwardly extending 25 radially folded integral lower end of the sheet, and a central button clamping against opposed surfaces of the margin of the opening at the center of said bottom and holding said folds pressed tightly against each other at the center, 30 the material at the junction of the side wall of the receptacle and the bottom being inwardly, upwardly, and downwardly curved to form a hollow integral reinforcing ring, the receptacle being impregnated with liquid proof material.

4. A receptacle of the character described formed of a single sheet of flexible material shaped to tubular form and secured at the'longitudinal marginal edges, the bottom of the receptacle being formed by an inwardly extending 40 radially folded integral lower end of the sheet, and a central button clamping against opposed surfaces of the margin of the opening at the center of said bottom, the material at the Junction of the side wall of the receptacle and the 45 bottom being inwardly, upwardly, and downwardly curved to forr a hollow integral reinforcing ring, the receptacle being impregnated with liquid proof material, the bottom being upwardly domed and radially folded. 50

5. A receptacle of the character described formed of a single sheet of flexible material shaped to approximately tubular form and secured at the longitudinal marginal edges of the sheet, the bottom being formed by an inwardly extending radially folded integral lower portion of the sheet, a reinforcing sheet disposed against the bottom, and a central button clamping against the opposed surfaces of the margin of the central opening of the bottom portion and the reinforcing sheet, the outer margin of the reinforcing sheet at the junction of the bottom with the side edge of the receptacle being turned inwardly to form a reinforcing bead, the receptacle being impregnated with liquid proof material.

6. A receptacle of the character described formed of a single sheet of flexible material shaped to approximately tubular form and secured along the longitudinal marginal edges. the bottom of the receptacle being formed by an inwardly extending radially folded integral lower end of the sheet, and a central two-part button clamping against the opposed surfaces of the margin of the opening at the center of said bottom, the bottom having an upwardly domical shape.

7. A receptacle of the character described having an upwardly domical integral bottom, the side wall of the receptacle and the bottom at the junction of the bottom with the side wall being upwardly, outwardly, and downwardly turned to form a reinforcing ring.

8. A receptacle of the character described, hav- 10 ing a substantially cylindrical'outer wall and having an upwardly domical integral radially folded unslitted bottom, the receptacle at the junction of the side wall with the bottom being formed to provide a reinforcing ring, and a twopart clamping button engaged with the center of the bottom and holding these folds fiat against each other throughout the entire extent of the folds.

JOSEPH J. SCHMERLER. 

